Improvement in earth-augers



- thus the shaft serves as its guide.

UNITED STATES- PATENT OFFICE.

IsAAo HOOVER, oE WEBSTER, oHIo.

IMPROVEMENT IN EARTH-AUGERS. l

Specification forming part of Letters Patent N o. l87,759, dated February 27, 1877 application filed l January B, 1877.

To all whom Iit may concern Be it known that I, ISAAC HOOVER, of Webster, Darke county, State of Ohio, have invented Improvements in Earth-Angers, of which the following is a specification:

My invention relates to augersdesigned for boring wells, and pertains to a device for sustaining a fixed relation ofthe enlarging a-uger to the shaft during the operation of boring.

The ligure represents a side elevation of the auger.

A represents a square shaft of suitable length, the top being supported by a derrick, in the usual manner, and at a suitable point is secured a draft-bar, to which horsepower is applied to operate the auger. At the lower end is attached a screw-point, F, to penetrate the earth as the shaft is rotated. The sleeve B is cylindrical, and has a square orice through its center, and it passes freely over the shaft. About this sleeve is secured the spiral plate E, and the lower end of which terminates in a cutter. Near the upper end is attached the bail D, which is supported on pins on either side. At the center of this bail is anA eye, to which the chain Gr is attached. C is a key, which enters the oriflce of the sleeve, and tightens the sleeve to the shaft.

At the top it has two arms, extending on`v veither side ofthe shaft, and these being connected by a bolt, the shaft is inclosed, and A part extendsiupward and outward, and has an eye for the attachment of the chain. The chain G is fastened to the bail, and then to the key,

and its upper end is supported on the shaft during the process of boring. The chain is so fastened that the weight of the .bail is added to the key to seat the same. The sleeve B, with the spiral E, constitutes the enlargingauger. As the shaft is turned the screw-point enters the earth, while the enlarging-auger carries up the earth along its spiral, and when sufljciently loaded, the chain is passed over a pullcy,`and thereby raised to the top of the ground for discharge.

The operation of the key is to bind the enlarging-auger to the shaft, and thus preserve a fixed relation ofthe two parts.

ln the process of raising the enlarging-auger the tension on the chain rst raises the key from its seat, and thereby permitting a free movement of this auger along the shaft.

In boring in the earth and coming on a stratum of sand, the shaft would rapidly ad- Vance and leave the enlarging-auger behind,

Aand to prevent this is the purpose ofthe key. r

The gravity of the wedge-shaped key, the bail and the end of the chain are sufficient to bind the enlarging-auger to the shaft.

What I claim as my invention is- The key (l, in combination with the enlarging-auger B, bail D, shaft A, and chain Gr, substantially 'as set forth.

IsAAo HOOVER.

Witnesses:

J. J. BELVILLE, BARTON PIGKERING. 

